: Dean’s signature synth work adds a thick, cinematic fog to the track.

The search for refers to a specific, high-fidelity unreleased version of the track "Heaven and Hell" from Kanye West's tenth studio album, Donda .

Why 301? In the chaotic workflow of the Donda sessions, Kanye and his team often went through hundreds of iterations a night. Mix 301 implies that this was a late-stage revision—likely occurring sometime between the third listening party (Chicago, August 26, 2021) and the official release (August 29, 2021).